forgotten self

src/pydata_sphinx_theme/toctree.py

@@ -113,7 +113,7 @@ def unique_html_id(base_id: str):
         return next(get_or_create_id_generator(base_id))
 
     @cache
-    def _generate_nav_info() -> List[LinkInfo]:
+    def _generate_nav_info(self) -> List[LinkInfo]:
         """Generate informations necessary to generate nav.
 
         Instead of messing with html later, having this as a util function